Cardiovascular System Flashcards
Endocardium
Inner lining of the heart. This layer of endothelial cells lines the chamber and valves within the heart
Myocardium
Muscle layer of the heart. This is literally the heart muscle and gives the heart the power to push the blood throughout the body
Pericardium
Membrane surrounding the heart. This membrane is actually a two-layer sac made up of visceral pericardium and parietal pericardium. This visceral layer adheres to the heart, whereas the parietal layer lines the fibrous outer portion of the pericardium. The space between the heart and the pericardium is termed the precardial space is a fluid that acts as a lubricant got the membranes as the heart beats. This fluid is called pericardial fluid
The flow of blood
Venal Cavae-right atrium-tricuspid valve-right ventricle-pulmonary valve-pulmonary arteries-lungs-pulmonary veins-left atrium-bicuspid valve-left ventricle-aortic valve-aorta-body
White lead
Green lead
Black lead
Red lead
Right front
Right rear
Left front
Left rear
P wave
Represents atrial function, specifically depolarisation or excitation of the atria
PR segment
Represents conduction through the AV node
QRS wave
Represents ventricular function, specifically the excitation of the ventricules
ST segment
Represents the end of ventricular depolarisation and the onset of ventricular depolarisation
T wave
Represents the relaxation phase from the contraction. This is the recovery (repolarisation) of the ventricles
Aorta
Largest artery in the body
Aortic valve
Valve between the left ventricle and aorta
Apex
Pointed end of the heart
Artery
A large vessel that carries blood away from the heart
Atrioventricular bundle
Specialised muscle fibres in the interventricular septum that carry electrical impulses to the ventricules. Also called the bundle of His
AV node
Specialised tissue in the interatrial septum; carries impulses from the SA node to the walls of the ventricles
AV valve
Valves between the atria and ventricles
Atrium
Two upper heart chambers
Bas
Cranial portion of the head
Bicuspid valve
Valve between the left atrium and left ventricle. Also called the mitral valve or left AV valve
Bifurcat
Splitting into two branches
Capillaries
Smallest blood vessels
Carbon dioxide
Gas released by tissue cells and transported to the heart and lungs for exhalation
Coronary arteries
Supply blood and oxygen to the myocardium
Deoxygenated blood
Oxygen-poor blood
Diastole
The relaxation phase of the heartbeat
Endocardium
Inner lining of the heart
Endothelium
Epithelial cells lining the heart cavity and vessels
Myocardium
Muscle layer of the heart
Oxygen
Gas that entered the blood through the lungs and travels to the heart to be pumped to the rest of the body
Oxygenated blood
Oxygen-rich blood
Pericardium
Membrane surrounding the heart
Pulmonary artery
Artery that carries deoxygenated blood from the heart to the lungs
Pulmonary circulation
Flow of blood from the heart, to the lungs, and back to the heart
Pulmonary valve
Valve between the right ventricle and pulmonary artery
Pulmonary veins
Veins that cart oxygenated blood from the lungs to the heart